Joint



H. C. LORD l July 21, 1936.

Nov. l0, 1931 1% VAVINI/E135 i Peasants-21, 193s,

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2,047,976 JOliNT Hugh C. Lord, Erle, Pa.

' Application November 10, 1931, Serial No. 574,071

wed October 22, 1935 2 Claims. (Cl. 287-85) The present invention relates to joints utilizinsrubber as the element accommodating the j int through its distortion. Such joints have heretofore been made involvingv an outer and ,5 in ner member with an intervening wall of rub ber. Under some conditions it is desirable to have a comparatively free angular movement of the members relatively to eachother, that is to say, a movement of the axis of one into a position at an angle to 'the axis oi' the other. This is very often true where there is a. rotative movement in a direction approximating the axis 'of the joint and a swinging movementcrosswlse of the axis. The present invention is designed to l5 make the joint more readily yieidable at its ends to accommodate such crosswise movement. Features and details -of the invention will appear from the speciiication and claims.

A preferred embodiment of the invention is zo' illustrated inthe accompanying drawing as, folf' lowszl Fig. 1 shows an end view oi' the joint so formed. Fig. 2 a section on the line 2-2' in Fig. 1. Fig. 3 a view oi.' one form oi' rubber and central member formed asa preliminary to making the joint shownin Fig. 2.-

Fig. 4 a. view showing the manner of-.assembly of the part shown in Fig. 3 into the outer member of Fig. 2. Fig. 5 shows a modified form of central member with the rubber formed thereon.

Fig. 6 the completed joint using the central Y member shown in Flg.5. j

Y Fig. 'I shows a central member with the rubber fOl'med thereon. Q Fig. `8 a completed joint in which thecentral member shown in Eg. 'I is'used. In the construction shown in Fig.1, i marks theinnermemberltheoutermember, andlthe vWall between the members. It will benoted that the outer member is o! hour-glass shape iiaring from the centert toward the ends and that the initial shape'o'fthe in compression is shown in Fig. 3, the outer wall v@beingSubstantiallyiMindricaI. 'nierubberlis- Preferably'bondedtotheoentralmemberandised in the in the manner shown in Fig.- 4, a runeli being arranged on 'theoutermember.theoutermemberbeingplaoed 5o 0B a Support I, and the rubber member forcedA into'theoutermemberbyontheinner memberthroughapiunger'hwiththisoomrubber when the rubber isv isccmpressed to a much greater extent atthe lcenter axially of the joint than at the ends. In consequence there is a greater freedom of movement at the ends than at the center and the greater wall of rubber facilitates this. 5 Y If desired, the outer and inner members may be formed as shown in Fig. 2 and the rubber vulcanized in place. Under these conditions the greater. wall of rubber at the 'ends will give a greater 'freedom of movement. f l0 .In the structure showniin Figs. 5 and 6, the inner member 8 is a cylindrical pin. A wall of rubber 9 is arranged within a cylindrical shell I0.' In forming the rubber initially it has a very much greater diameter at the central portion II than 15 at the vendand in consequence in the iinalorm in the joint the rubber is forced into the shell and has greater compression at the center than at the ends and consequently it is less resistant at the ends than atthe center. 20

'I'he same result is accomplished to an .extent I in the. modification shownfin Figs. 7 and 8 where f atively to the center pin should be formed to provide a less resistance in the manner' indicated in the several modications toward the end so 3`5 that the joint will wobble, or permit of freer an- Y guiar movementthan with the rubber'of uniform density throughout, or of greater density toward the ends.

, 1. In a joint. an outer member;` an inner member within the outer member; and a rubber wall vunder compression between the members bonded vto the inner member'and the compression being greater in intermediate potions than at the ends.

2. In a Joint, an outer member; an inner member within the outer member; and a rubber .wall lmder compression between the members bonded to the inner member throughout the length o! the joint and the compresion being greater in Y intermediate portions than at the ends.' 'jresgon'ioint it will lhe noted that the rubber 4HUGH c. Loan. 

